knock sensor

[elefantman]

Am i right in thinking the knock sensor retards the ignition timing?

 

[Engineer]

Am i right in thinking the knock sensor retards the ignition timing?

I belive this is true - if knocking is detected then timing is retarded until it stops.

 

[littleredrooster]

Yes - it runs the timing on the verge of detonation all the time. This ensures maximum eficiency and means that it can take advantage of the latest 'super-fuels' which can withstand more advance (and hence offer either more power, or better economy). My own 'seat-of-the-pants' trials (and careful mpg monitoring) suggest that BP Ultimate and Total Excellium are both quite good, and both Shell and Texaco fall somewhat short or the mark.